lib/perl5/5.6.1/unicode/UCD301.html

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  18 <h1>UNICODE CHARACTER DATABASE<br>
  19 Version 3.0.1</h1>
  20 <table border="1" cellspacing="2" cellpadding="0" height="87" width="100%">
  21   <tr>
  22     <td valign="TOP" width="144">Revision</td>
  23     <td valign="TOP">3.0.1</td>
  24   </tr>
  25   <tr>
  26     <td valign="TOP" width="144">Authors</td>
  27     <td valign="TOP">Mark Davis and Ken Whistler</td>
  28   </tr>
  29   <tr>
  30     <td valign="TOP" width="144">Date</td>
  31     <td valign="TOP">2000-08-17</td>
  32   </tr>
  33   <tr>
  34     <td valign="TOP" width="144">This Version</td>
  35     <td valign="TOP"><a
  36       href="http://www.unicode.org/Public/3.0-Update1/UnicodeCharacterDatabase-3.0.1.html">http://www.unicode.org/Public/3.0-Update1/UnicodeCharacterDatabase-3.0.1.html</a></td>
  37   </tr>
  38   <tr>
  39     <td valign="TOP" width="144">Previous Version</td>
  40     <td valign="TOP"><a
  41       href="http://www.unicode.org/Public/3.0-Update/UnicodeCharacterDatabase-3.0.0.html">http://www.unicode.org/Public/3.0-Update/UnicodeCharacterDatabase-3.0.0.html</a></td>
  42   </tr>
  43   <tr>
  44     <td valign="TOP" width="144">Latest Version</td>
  45     <td valign="TOP"><a
  46       href="http://www.unicode.org/Public/UNIDATA/UnicodeCharacterDatabase.html">http://www.unicode.org/Public/UNIDATA/UnicodeCharacterDatabase.html</a></td>
  47   </tr>
  48 </table>
  49 <p align="center">Copyright © 1995-2000 Unicode, Inc. All Rights reserved.</p>
  50 <h2>Disclaimer</h2>
  51 <p>The Unicode Character Database is provided as is by Unicode, Inc. No claims
  52 are made as to fitness for any particular purpose. No warranties of any kind are
  53 expressed or implied. The recipient agrees to determine applicability of
  54 information provided. If this file has been purchased on magnetic or optical
  55 media from Unicode, Inc., the sole remedy for any claim will be exchange of
  56 defective media within 90 days of receipt.</p>
  57 <p>This disclaimer is applicable for all other data files accompanying the
  58 Unicode Character Database, some of which have been compiled by the Unicode
  59 Consortium, and some of which have been supplied by other sources.</p>
  60 <h2>Limitations on Rights to Redistribute This Data</h2>
  61 <p>Recipient is granted the right to make copies in any form for internal
  62 distribution and to freely use the information supplied in the creation of
  63 products supporting the Unicode<sup>TM</sup> Standard. The files in the Unicode
  64 Character Database can be redistributed to third parties or other organizations
  65 (whether for profit or not) as long as this notice and the disclaimer notice are
  66 retained. Information can be extracted from these files and used in
  67 documentation or programs, as long as there is an accompanying notice indicating
  68 the source.</p>
  69 <h2>Introduction</h2>
  70 <p>The Unicode Character Database is a set of files that define the Unicode
  71 character properties and internal mappings. For more information about character
  72 properties and mappings, see <i><a
  73 href="http://www.unicode.org/unicode/uni2book/u2.html">The Unicode Standard</a></i>.</p>
  74 <p>The Unicode Character Database has been updated to reflect Version 3.0 of the
  75 Unicode Standard, with many characters added to those published in Version 2.0.
  76 A number of corrections have also been made to case mappings or other errors in
  77 the database noted since the publication of Version 2.0. Normative bidirectional
  78 properties have also been modified to reflect decisions of the Unicode Technical
  79 Committee.</p>
  80 <p>For more information on versions of the Unicode Standard and how to reference
  81 them, see <a href="http://www.unicode.org/unicode/standard/versions/">http://www.unicode.org/unicode/standard/versions/</a>.</p>
  82 <h2>Conformance</h2>
  83 <p>Character properties may be either normative or informative. <i>Normative</i>
  84 means that implementations that claim conformance to the Unicode Standard (at a
  85 particular version) and which make use of a particular property or field must
  86 follow the specifications of the standard for that property or field in order to
  87 be conformant. The term <i>normative</i> when applied to a property or field of
  88 the Unicode Character Database, does <i>not</i> mean that the value of that
  89 field will never change. Corrections and extensions to the standard in the
  90 future may require minor changes to normative values, even though the Unicode
  91 Technical Committee strives to minimize such changes. An<i> informative </i>property
  92 or field is strongly recommended, but a conformant implementation is free to use
  93 or change such values as it may require while still being conformant to the
  94 standard. Particular implementations may choose to override the properties and
  95 mappings that are not normative. In that case, it is up to the implementer to
  96 establish a protocol to convey that information.</p>
  97 <h2>Files</h2>
  98 <p>The following summarizes the files in the Unicode Character Database. &nbsp;For
  99 more information about these files, see the referenced technical report(s) or
 100 section of Unicode Standard, Version 3.0.</p>
 101 <p><b>UnicodeData.txt (Chapter 4, <a
 102 href="http://www.unicode.org/unicode/reports/tr21/">UTR #21: Case Mappings</a>, <a
 103 href="http://www.unicode.org/unicode/reports/tr15/">UAX #15 Unicode Normalization
 104 Forms</a>)</b>
 105 <ul>
 106   <li>The main file in the Unicode Character Database.</li>
 107   <li>For detailed information on the format, see <a href="UnicodeData.html">UnicodeData.html</a>.
 108     This file also characterizes which properties are normative and which are
 109     informative.</li>
 110 </ul>
 111 <p><b>PropList.txt (Chapter 4)</b>
 112 <ul>
 113   <li>Additional informative properties list: <i>Alphabetic, Ideographic,</i>
 114     and <i>Mathematical</i>, among others.</li>
 115 </ul>
 116 <p><b>SpecialCasing.txt (Chapter 4, <a
 117 href="http://www.unicode.org/unicode/reports/tr21/">UTR #21: Case Mappings</a>)</b>
 118 <ul>
 119   <li>List of informative special casing properties, including one-to-many
 120     mappings such as SHARP S =&gt; &quot;SS&quot;, and locale-specific mappings,
 121     such as for Turkish <i>dotless i</i>.</li>
 122 </ul>
 123 <p><b>Blocks.txt (Chapter 14)</b>
 124 <ul>
 125   <li>List of normative block names.</li>
 126 </ul>
 127 <p><b>Jamo.txt (Chapter 4)</b>
 128 <ul>
 129   <li>List of normative Jamo short names, used in deriving HANGUL SYLLABLE names
 130     algorithmically.</li>
 131 </ul>
 132 <p><b>ArabicShaping.txt (Section 8.2)</b>
 133 <ul>
 134   <li>Basic Arabic and Syriac character shaping properties, such as initial,
 135     medial and final shapes. These properties are normative for minimal shaping
 136     of Arabic and Syriac.</li>
 137 </ul>
 138 <p><b>NamesList.txt (Chapter 14)</b>
 139 <ul>
 140   <li>This file duplicates some of the material in the UnicodeData file, and
 141     adds informative annotations uses in the character charts, as printed in the
 142     Unicode Standard.</li>
 143   <li><b>Note: </b>The information in NamesList.txt and Index.txt files matches
 144     the appropriate version of the book. Changes in the Unicode Character
 145     Database since then may not be reflected in these files, since they are
 146     primarily of archival interest.</li>
 147 </ul>
 148 <p><b>Index.txt (Chapter 14)</b>
 149 <ul>
 150   <li>Informative index to Unicode characters, as printed in the Unicode
 151     Standard</li>
 152   <li><b>Note: </b>The information in NamesList.txt and Index.txt files matches
 153     the appropriate version of the book. Changes in the Unicode Character
 154     Database since then may not be reflected in these files, since they are
 155     primarily of archival interest.</li>
 156 </ul>
 157 <p><b>CompositionExclusions.txt (<a
 158 href="http://www.unicode.org/unicode/reports/tr15/">UAX #15 Unicode Normalization
 159 Forms</a>)</b>
 160 <ul>
 161   <li>Normative properties for normalization.</li>
 162 </ul>
 163 <p><b>LineBreak.txt (<a href="http://www.unicode.org/unicode/reports/tr14/">UAX
 164 #14: Line Breaking Properties</a>)</b>
 165 <ul>
 166   <li>Normative and informative properties for line breaking. To see which
 167     properties are informative and which are normative, consult UAX #14.</li>
 168 </ul>
 169 <p><b>EastAsianWidth.txt (<a href="http://www.unicode.org/unicode/reports/tr11/">UAX
 170 #11: East Asian Character Width</a>)</b>
 171 <ul>
 172   <li>Informative properties for determining the choice of wide vs. narrow
 173     glyphs in East Asian contexts.</li>
 174 </ul>
 175 <p><b>BidiMirroring.txt</b><b> (<a
 176 href="http://www.unicode.org/unicode/reports/tr9/">UAX #9:&nbsp;The
 177 Bidirectional Algorithm</a>)</b></p>
 178 <ul>
 179   <li>Informative properties for substituting characters in an implementation of
 180     bidirectional mirroring.</li>
 181 </ul>
 182 <p><b>CaseFolding.txt (<a href="http://www.unicode.org/unicode/reports/tr21/">UTR
 183 #21: Case Mappings</a>)</b></p>
 184 <ul>
 185   <li>Informative file mapping characters to their case-folded form.</li>
 186 </ul>
 187 <p><b>NormalizationTest.txt (<a
 188 href="http://www.unicode.org/unicode/reports/tr15/">UAX #15 Unicode Normalization
 189 Forms</a>)</b></p>
 190 <ul>
 191   <li>Normative test file for conformance to Unicode Normalization Forms.</li>
 192 </ul>
 193 <p><b>diffXvY.txt</b>
 194 <ul>
 195   <li>Mechanically-generated informative files containing accumulated
 196     differences between successive versions of UnicodeData.txt</li>
 197 </ul>
 198
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